1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb859611ecb5dc1f31adaa38e1dba69133bb442f0c5343bac8407c4866c80178. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db7505c0-03a6-4fac-87c2-b3600feecbee.json and https://artists.proofprofile.net/proofs/artist/db7505c0-03a6-4fac-87c2-b3600feecbee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b739a6d98a4bfc7a5d226cf28d6cd621738c4d1d57f8c9be346f87f4bbdceaa. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cb3fd55092ea3589e6a09a1fdf6d191fd315f49ce994e6f560bdc4284b6f72. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232e77ee4998435ae71eff0a01f881411e75773a361be6d0ba7bc6a82be1ee72. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99f599326f621dd8c2f75d9e4cb4c80f25ffb46a2dbbd7fe2f2fbaec941f771. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854d2eba0b6946d3e8ffd43bbb84f5d86a481b09d1ac508b2398bf910edc24f6. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:38:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3714808d7dbd9a6c85a4bc842817d221decfbfc6f7e4432828707458157fb7. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec326383ee3a57e40b67682806e036ab344f55cb91536195e778258e4e869052. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df4a54ad53757b8118d83cd926e139a520b0f05ade98d8ca0cb43ebcde75094. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e862d258f6d2f99ff259b7f6ae57b55f66ec475ddbae99a45f45a444ea80d24. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99033d06ab8a24f9168c433f49fcadc4c9d59844412793931b1e0c1c6a4e0bce. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2b573c85fccb4f504f9e2894a1d031ebe3370432e0572927903f68997018bb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:09:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7764ec0f89785fc0c79d38192f38c9eb0a9915272dc85cb85ae0df51f2761b7e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ac5b1fbe24d846579b0093a09b130bcc9005e9bb8606fa37331c6017dd431c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce53cbbe7ed5b34b65828b60878e975913a560d981f315b59d739fafc97fb926. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAPG1749781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c147d54b3eb994c791ce1b0c232d8a17ebd2fdd43ab1668b0d9f3bdedf47b8a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4JJ1825491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5b78a16eddbf8cfe2c650056804be0405d03c20e708e2cb40686a97efdc7b1. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4JJ1825493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830da2fdde8ec942bfb48979d1cf7c2e1cef18c8abba3b27153a4968ca126c1f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYZ2198916.